Lithium acetate-catalyzed Michael reactionbetween trimethylsilyl enolates and α,β-unsaturated carbonyl compounds in DMF proceeded smoothly to afford the corresponding Michael-adducts in good to hi...
The Mukaiyama–Michael addition of a β,β-dimethyl substituted silyl ketene acetal to α,β-unsaturated ketones using tetra-n-butylammonium bibenzoate as a nucleophilic catalyst
作者:Rudhramyna Gnaneshwar、Prakash P. Wadgaonkar、Swaminathan Sivaram
DOI:10.1016/s0040-4039(03)01511-9
日期:2003.8
The Michael addition of a β,β-dimethyl substituted silyl ketene acetal [Me2CC(OMe)OSiMe3] to α,β-unsaturatedketones, namely, 2-cyclopentenone, 2-cyclohexenone, 3-methyl-2-cyclohexenone, isophorone, methyl vinyl ketone and mesityl oxide occurs smoothly in the presence of the nucleophilic catalyst, tetra-n-butyl ammonium bibenzoate (TBABB) in THF giving the corresponding 1,4-adducts in excellent yields